diff --git a/g10/sign.c b/g10/sign.c
index 6ff7df6a9..501f1ff25 100644
--- a/g10/sign.c
+++ b/g10/sign.c
@@ -1604,6 +1604,8 @@ update_keysig_packet( PKT_signature **ret_sig,
     /* create a new signature packet */
     sig = copy_signature (NULL, orig_sig);
 
+    sig->digest_algo=digest_algo;
+
     /* We need to create a new timestamp so that new sig expiration
        calculations are done correctly... */
     sig->timestamp=make_timestamp();